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Business technology essay：evaluation for software

自从苹果3的首次亮相，打开智能手机的窗口，移动应用在我们的日常生活和工作中发挥着越来越重要的作用。Uber是一个互联网革命和创新的最佳样本，尽管其他几家公司试图复制Uber业务模式，Uber已经实现在50多个国家和300个城市的服务。

Introduction 引言
Since the debut of iPhone 3, which opened the window of smart phone, mobile application has been playing more and more important role in our daily life and work. Uber is one of the best samples of Internet revolution and innovation, though several other companies tried to copy the function and business mode of Uber, Uber has realize service in more than 50 countries and 300 cities.

Context description 背景描述
Uber is a mobile application for optimizing personal transportation, which was initially released in 2009 by Uber Technology Inc. There are two major parties connected in this app, the Uber car drivers and users. It is a platform for users to submit trip request and meanwhile, drivers could see the requests then they can answer the request in the application. In this way, Uber makes transportation more efficient.

Requirements Analysis 需求分析
Two functional requirements and two usability requirements
Uber-F1
Uber allows users to request ride from current place to destination, with estimated payment, estimated arrival time and how much time it takes the nearest Uber car to take the user.Though there are other taxi, car sharing, private car rental applications, Uber makes it outstanding on this aspect, based on its market share and application rate, downloads on each application market world widely. This is the core function of Uber and its core competition.

Uber-F2
Uber is authorized to directly pay from the bankcard you connected to it when you sign in and connect a bankcard. Comparing to the traditional taxi, user does not need to process any payment. When a user opens Uber at the first time, Uber requires the user to sign up before using any service of Uber. During the process of sign-up, Uber requires user to connect and authorize direct automatically deduction after each ride at least one payment method, such as PayPal, Visa, MasterCard, etc.

Uber-U1
Uber saves money and time, and makes users to get ride more efficiently comparing to traditional taxi, since all the information, such as estimated payment, estimated arrival time, how many Uber cars around the user, how much time it takes the nearest Uber car to get the user, all the information are visual and clear.

Uber-U2
Uber directly deducts money from connected bankcard makes payment more convenient and more efficient, more friendly. On the aspect of traffic, user can leave the real bankcard alone. A cell phone will be fully enough for a Uber user.

Evaluation 评价
Functional evaluation for the two requirements
Usability evaluation for the two requirements
Uber-F1
Uber estimated money, if the arrival time and estimated time that the nearest Uber car reaches you are accurate; it is necessary to test this requirement. As can be seen as following picture, Uber shows how many Uber cars around the user at real time. When check in the app of Uber, it is easy to find out that the cars are moving and the estimated time are changing. When the user starts to call a pickup, Uber starts to